Answer:
Step-by-step explanation:
a). 3x²y⁴ × 2x⁶y
= 6(x² × x⁶)(y⁴× y)
= [tex]6x^{(2+6)}y^{(4+1)}[/tex]
= 6x⁸y⁵
b). xz³ × 4x⁴z⁵
= [tex]4x^{(1+4)}\times z^{(3+5)})[/tex]
= 4x⁵z⁸
c). 4a³b² × 3a⁶b⁵
= [tex]12a^{(3+6)}b^{(2+5)}[/tex]
= 12a⁹b⁷
d). 6s⁵t × s⁴t²
= [tex]6s^{(5+4)}t^{(1+2)}[/tex]
= 6s⁹t³
